On 5/27/19 5:02 PM, Ming Lei wrote:
Hisi_sas_v3_hw, hpsa, megaraid and mpt3sas use single blk-mq hw queue
to submit request, meantime apply multiple private reply queues served as
completion queue. The mapping between CPU and reply queue is setup via
pci_alloc_irq_vectors_affinity(PCI_IRQ_AFFINITY) just like the usual
blk-mq queue mapping.
These drivers always use current CPU(raw_smp_processor_id) to figure out
the reply queue. Switch to use request's CPU to get the reply queue,
so we can drain in-flight request via blk-mq's API before the last CPU of
the reply queue becomes offline.
Signed-off-by: Ming Lei <ming....@redhat.com>
---
drivers/scsi/hisi_sas/hisi_sas_main.c | 5 +++--
drivers/scsi/hpsa.c | 2 +-
drivers/scsi/megaraid/megaraid_sas_fusion.c | 4 ++--
drivers/scsi/mpt3sas/mpt3sas_base.c | 16 ++++++++--------
include/scsi/scsi_cmnd.h | 11 +++++++++++
5 files changed, 25 insertions(+), 13 deletions(-)
Reviewed-by: Hannes Reinecke <h...@suse.com>
Cheers,
Hannes
